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licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
Inhomogeneous phase microstructure of material form Fe-Al system after crystallization (a–c) and homogenization to FeAl2 phase, as the result of annealing at temperature 1050 °C for 100 h (d).